Add attenuation scene to build settings

TestProjects/LWGraphicsTest/ProjectSettings/EditorBuildSettings.asset

   - enabled: 1
     path: Packages/com.unity.testing.srp.lightweight/Tests/Scenes/050_Shader_Graphs.unity
     guid: 6e7a83866a1e446b3becf7972371c5d0
+  - enabled: 1
+    path: Packages/com.unity.testing.srp.lightweight/Tests/Scenes/052_Lighting_Attenuation.unity
+    guid: 93a99004f07ca6f4dbbc9ccb319c7698
   m_configObjects: {}